I helped sail a boat from Hawai'i to the San Juan Islands. I have hiked the Sunshine Coast trail. I have worn through the bottom bracket of a bicycle, and put 10s of thousands of km on two human-powered wheels
I cannot change the world's views about air travel. The time differential is just too great for most people.
But in a couple years we will be heading back to the EU to volunteer with WHO, and we plan to train to the east coast, and catch a ship for the crossing. Because I *can*.